Dental vibratory matrix



June 28,1927.

T. TERAGAWA DENTAL vrmwony umm:

Filed Dec. 6. 1926 I Vernon TAxeo TsnAeAw.

Patented June 28, 1927. i

UNITED STATES TAKEO TERAGAWA, OF LOS ANGELES, CALIFORNIA.

DENTAL VIBRATORY MATRIX.

Application med December s, 1926. serial No. 152,931. Y

This invention relates to improvements in matrix devices for use in dentistry, and its objects are to simplify porcelain technology in dentistry, and to expedite the process per- 5 taining thereto.

Other objects are to avoid dismembering the porcelain tip or saddle before it is subjected to the baking process, to produce on the porcelain tip, a smooth and sharp-anm gled shelf for the drawing of a perfect wax pattern in making gold backings, to provide means for vibrating the matrix whereby the porcelain powder is betterv lubricated and more quickly condensed, and to provide im- ]5 proved clamp elements for the matrix, whereby the tip or saddle is held in perfect adjustment in the desired position, and the vengaging and disengaging of the porcelain facings is simplified.

Another object is to provide a vibratory matrix embodying simplicity, eiiiciency, reasonable cost of production, and ease of operation without skilled knowledge on the part of the instructed.

Other objects and advantages may appear in the subjoined detail description.

In the drawings, Figure 1 is a side elevation of a vibratory dental matrix embodying the features of the present invention. Fig. 2 is a top plan view of the dental matrix. Fig. 3 is a fragment-ary and sectional view of the handle, showing the vibratory elements. Fig. 4 is a detail view of the vibratory spring. Fig. 5 is a fragmentary and enlarged view of the device with parts in section, and showing the device in use.

Referring to the drawings, the top plate member 11, is of a circular form, and has therein, the apertures 12, each adapted to receive al tooth form 13. The cover 1A, has similar apertures. rIhe main plate member 11 is secured to the handle shank 15, and is further provided with depending flanges 16. The cover 14, serves as a holding member for the tooth forms, and is pivotally secured to the handle by a retaining nut 17 and washer 18.

The holding element-s relative to each aperture, are substantially duplicates, and a description of one set vof holding elements will suflice. Each set of holding elements consists of a movable jaw member 19, having integral supporting rods 20, which pass through a depending flange 16. A plate 21, connecting the extremities of `rods 20, may be pressed by the operator to move jaw member 19 toits release position, and springs 22, interposed between plate 21 and flange 16,

'serve to actuate the movable jaw to opertoothed wheel is rotated, produce vibrations in all parts of the holding elements, thereby settling and condensing the porcelain powder quickly in the processes for which the matrix is intended. It may be noted that ap-erture 12, has a notch 30, adapted to receive a longer tooth, or to hold the tooth in a different position. The holder or cover 14, when the tooth form is to be removed from the matrix, may be rotated backwardly, thereby leaving a straight edge on the tooth, whereby the same may be readily removed.

In use, the tooth form is supported as y shown in Fig. 5, for the ceramic processes involved, and, through the vibratory mechanism, the processes are hastened, thereby saving time, and the holding elements tend to form perfect abutment edges for facings and backings.

lVhat is claimed is:

1. In a dental matrix of the character set forth, a. plate member having two apertures therein, depending flange portions adjacent to each aperture, a movable jaw mounted in opposed relation to each depending flange portion, springs normally urging the movable jaws to operative position, a cover mounted in the top of the plate member and having apertures to correspond with the apertures in the plate member, a handle for the plate member, and manually actuated vibratory elements mounted in the handle.

2. Ina dental matrix of the character set forth, a platev member and a cover for the plate member, each of circular form andv each having corresponding apertures therein, depending flange portions adjacent to the apertures in the plate member and integral with the plate member, a movable jaw mounted in opposed relation to each depending flange portion, a spring normally urging each movable jaw to operative position, a handle for the plate member, said plate member and cover being 3o-axially arranged rel atiye to the handle, and manually actuated vibratory elemente mounted in the handle.

3. ln a dental matrix ot the cliaiaetefset forth, the combination `with two substantial ly circular members, each having two apertures therein, and one mounted `above the other, the upper member being' .independent ly rotatable relative to the lower member,

l0 of depending flange portions on the lower member and adjacent to the apertures therein, a movable and sprngeaetuated jaw mounted in opposed relation to each depending flange portion, a handle axially arranged relative to and supporting the circular members, and manually actuated vbratory elements in the handle.

In testimony whereof, I hereunto alli); my

signature.

TAKE() TERAGAVA. 

